Dolly for lifting and transporting and installing large sheets of flat glass and other flat sheet products

ABSTRACT

A dolly for lifting and transporting and installing large sheets of flat glass or other flat sheet products and comprising an elongated frame with a guideway for receiving an edge of the glass, the bottom of the guideway being provided with spaced apart hard rubber rollers that can rotate to permit the flat glass to be moved on or off of the guideway. The dolly has a centrally disposed and upwardly extending mast that is pivotally connected to the dolly and can be swung laterally through an angle of about 27*. A glass supporting frame is slidably and pivotally mounted on the mast and can be raised and lowered on the mast by means of a manually operated or electric winch and cable. The glass supporting frame has an arm mounted at its free end and extending in the direction of the length of the elongated dolly frame. This arm removably carries a vacuum cup at each end designed to grip and support a flat glass sheet. It is possible to pull a flat sheet of glass onto the dolly from an end of the guideway. It is also possible to swing the mast laterally in order to position the vacuum cups on the glass lifting frame at the desired locations on the side of the sheet of glass whereupon the vacuum cups may be secured to the glass sheet and the winch actuated for lifting the glass and depositing it on the dolly.

United States Patent [191 Tausheck DOLLY FOR LIFTING AND TRANSPORTINGAND INSTALLING LARGE SHEETS OF FLAT GLASS AND OTHER FLAT SHEET PRODUCTS[75] Inventor: Russell W. Tausheck, Hayward,

Calif.

[73] Assignee: Ace Glass Co., Hayward, Calif.

[22] Filed: Aug. 5, 1971 [21] Appl. No.: 169,415

[52] US. Cl. 214/77, 214/1 SW, 214/1BV [51] Int. Cl B601) 1/14 [58]Field of Search 214/1 D, l BV, l H, 214/1 SW, 1 S, 130 R, 7, 77

[56] References Cited UNITED STATES PATENTS 2,418,586 4/1947 Jenkins2l4/l D 3,138,265 6/1964 Hansen 3,36l,280 l/l968 Travel 214/1 SW XFOREIGN PATENTS OR APPLICATIONS 658,431 2/1963 Canada 214/1 S PrimaryExaminerGerald M. Forlenza Assistant ExaminerFrank E. WernerAttorney-William R. Piper [5 7] ABSTRACT A dolly for lifting andtransporting and installing large sheets of flat glass or other flatsheet products and comprising an elongated frame with a guideway forreceiving an edge of the glass, the bottom of the guideway beingprovided with spaced apart hard rubber rollers that can rotate to permitthe flat glass to be moved on or off of the guideway. The dolly has acentrally disposed and upwardly extending mast that is pivotallyconnected to the dolly and can be swung laterally through an angle ofabout 27. A glass supporting frame is slidably and pivotally mounted onthe mast and can be raised and lowered on the mast by means of amanually operated or electric winch and cable. The glass supportingframe has an arm mounted at its free end and extending in the directionof the length of the elongated dolly frame. This arm removably carries avacuum cup at each end designed to grip and support a flat glass sheet.It is possible to pull a flat sheet of glass onto the dolly from an endof the guideway. It is also possible to swing the mast laterally inorder to position the vacuum cups on the glass lifting frame at thedesired locations on the side of the sheet of glass whereupon the vacuumcups may be secured to the glass sheet and the winch actuated forlifting the glass and depositing it on the dolly.

9 Claims, 10 Drawing Figures PATENTEllncnslma I sum 10F a INVENTOR.RUSSELL W. TAUSHECK fimebwiealr ATTORNEY v PATENTEU DU 1 6 I975 SHEET 3CF 4 I NVEN TOR.

RUSSELL W. TAUSHECK BY WLZQML E 723,

ATTORNEY PATENTEllucHs ma 3.755.550 SHEET 4 BF 4 s g I 7 1g 7 INVENTOR.

RUSSELL W. TAUSHECK 1' 5 W, n i A I- A ATTORNEY DOLLY FOR LIFTING ANDTRANSPORTING AND INSTALLING LARGE SHEETS OF FLAT GLASS AND OTHER FLATSHEET PRODUCTS BACKGROUND OF THE INVENTION 1. Field of the InventionLarge sheets of flat glass usually require two to six men to handle whenmoving the glass from one place to another. This operation is presentlyaccomplished by lifting the glass sheets by hand and using flat rubberpads or gloves for protection. I have designed a dolly and a sheet glasslifting mechanism that will permit one man to lift and transport largesheets of glass with much more safety to the operator compared to thepresent method. The elongated dolly can be moved in the direction of itslength or in a lateral direction and it can be swung about in a circlehaving a diameter no greater than its length. The dolly is provided withsafety floor locks that will prevent the accidental moving of the dollyover the supporting surface when lifting a sheet of glass onto or whenremoving the sheet from the dolly. From the dolly, sheets of glass maybe placed on a truck or onto a tilting cutting table or can bepositioned in an opening for installation at a constructio site.

2. Description of the Prior Art The U.S. Pat. No. 3,051,331, issued Aug.28, 1962 to Andre Schram, on a device for handling sheet material,discloses suction cups mounted on a frame that has an inclined frontface with a horizontal bar at its base on which the lower edge of aflat'sheet of glass may rest. Modified forms of the patented deviceillustrate that the suction cups can be moved forwardly to contact withthe pane of glass and then vacuum can be applied to the suction cups forattaching them to the glass after which the suction cups can be movedupwardly and rearwardly for positioning the sheet of glass against theinclined uprights of the frame so as to be supported in an inclinedposition by the horizontal bar.

The patentee does not disclose an elongated, guideway for the sheet ofglass in which transversely extending hard rubber rotatable rollersslidably support the lower edge of the glass that'is received in theguideway. Also, the patentee does not disclose a dolly with a centrallydisposed and upwardly extending mast that is pivotally connected to thedolly frame so as to be swingable laterally through an arc, the mastslidably and pivotally supporting a glass lifting frame that has vacuumcups for attaching to the side of a pane of glass so as to lift the paneonto the dolly and vice versa.

I SUMMARY OF THE INVENTION An object of my invention is to provide adolly for the safe lifting and transporting of large sheets of flatglass that will permit a single operator to safely load and unload thesheet of glass onto and off from the dolly without the aid of any otherperson. The transporting of the sheet of glass while it is on the dollycan be accomplished by the same operator without any help. The dolly andthe glass lifting mechanism are designed to provide safety for theoperator while he is operating the glass lifting mechanism or whilemoving the dolly from one place to another whether inside a warehouse orat a building site.

. A further object of my invention is to provide a dolly that isespecially designed for permitting an operator to pull a flat sheet ofglass from an open end of a case of glass and to pull the glass sheetdirectly onto the dolly which has previously been positioned so as toalign its elongated glass-receiving guideway with the length of the paneof glass. Also, the glass-lifting mechanism on the dolly has beendesigned to lift and remove a loosened case lid from a case of glass andthen to engage with the side of the exposed pane of flat glass and tolift it away from the case and deposit it on the dolly for transportingto the desired location. Glass sheets may also be packed into a case-byreversing the sequence just mentioned. The lifting mechanism is sodesigned as to position the operator on the opposite side of the dollyfrom the side supporting the pane of glass. In this way the operator isprotected.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of thedolly and the glass lifting mechanism and illustrates a large flat sheetof glass resting on the dolly.

FIG. 2 is a front elevation of the device without sup porting a sheet offlat glass.

FIG. 3 is an end elevation of the device when looking from the left handendof FIG. 2 in the direction of the arrows 33 in FIG. 2. I

FIG. 4 is a horizontal section taken along the line 4-4 of FIG. 2. Themain central support wheels have been positioned to permit the dolly tomove in the direction of its length as indicated by the double arrows inFIG. 4.

FIG. 5 is a view similar to FIG. 4, but shows the main central supportwheels swung about their vertical axes through arcs of to permit thedolly to be moved laterally in either direction as indicated by thedouble arrows in FIG. 5. I

FIG. 6 is an enlarged vertical transverse section taken along the line6-6 of FIG. 4 and illustrates one type of support for the main centralsupport wheel that will permit the wheel to be swung about a verticalaxis through an arc of 90 and secured against any accidental furtherrotation about the vertical axis in either direction.

FIG. 7 is a view similar to FIG. 6, but shows the main central supportwheel rotated about its vertical axis through an arc of 90 from thatillustrated in. FIG. 6. FIG. 7 is an enlarged vertical transversesection taken along the line 7-7 of FIG. 5.

FIG. 8 is an enlarged view of the circled portion 8 in FIG. 3 andillustrates the manner of removably mounting a standard suction cup onthe endof the lifting arm used in lifting flat glass sheets. Two suctioncups are used, one being mounted at each end of the arm.

FIG. 9 is a vertical transverse section taken along the line 9-9 of FIG.5 and illustrates the pivotal mounting for the mast.

FIG. 10 is a horizontal section taken along the line 10-10 of FIG. 3 andillustrates the catch mechanism used in holding the mast in a verticalposition.

DESCRIPTION OF THE PREFERRED EMBODIMENT In carrying out my invention, Iprovide a dolly frame indicated generally at A in FIGS. I5, inclusive.The frame preferably is formed from two parallelly arranged and spacedapart tubular members 1 and 2 that are rectangular in cross section.Transversely extending and spaced apart connecting tubular members 3,see FIG. 2, are welded to the undersides of the elongated and spacedapart tubular members 1 and 2. The spaced apart tubular members 1 and 2rotatably support a plurality of spaced apart and transversely extendinghard rubber rollers 4 that cooperate with the tubular members 1 and 2for providing an elongated guideway for receiving and supporting thelower edge of a large flat sheet of glass B, see FIG. 1. The hard rubberrollers 4 rotate on axles 5 that are supported by the elongated tubularmembers 1 and 2.

The elongated guideway for the lower edge of the flat sheet of blass Bis provided with two superimposed strips of wood 6 that are supported bythe tubular member 2, see FIG. 1. The inner edge of the upper wood strip6 is spaced inwardly a slight distance so as to prevent the lower edgeof the flat glass sheet from contacting the metal tubular member 2, seeFIG. 3. It will be seen from FIG. 1 that both of the wooden strips 6 arewider than the width of the supporting tubular metal member 2, and Itherefore provide additional supports consisting of short tubularlengths 7 and 8 that are welded to the outer side of the elongatedtubular member 2 and have their upper surfaces lying flush with theupper surface of the tubular member 2.

The other elongated tubular member 1 is provided with two metal tubularuprights 9 and 10, see FIG. 1, that are rectangular in cross section,see FIGS. 4 and 5, and have their lower ends welded to the member 1.Handles 11 and 12 are mounted near the tops of the uprights 9 and 10,respectively, and extend in a lateral direction, as shown in FIG. 1. Theuprights 9 and 10 are positioned near the ends of the tubular member 1and the handles 11 and 12 are placed in a position where either one maybe readily grasped by the operator when he desires to move the dolly. Anelongated wooden guide rail 13 parallels the tubular member 1 and isspaced above it and is secured to the uprights 9 and 10 by bolts 14 and15, or other suitable fastening means. Also, upstanding wooden strips 16and 17 are secured to the metal tubular uprights 9 and 10, respectively,and the lower ends of the strips abut the upper edge of the horizontalwooden guide rail 13. Additional shorter uprights 18 and 19 are placedbetween the end uprights 9 and 10 and a central mast C, and their lowerends are welded to the tubular member 1. These shorter uprights 18 and19 are provided with wooden strips 20 and 21, respectively, that extendupwardly from the horizontal strip 13. All of these wooden strips 13,16, 17, 20 and 21, lie in the same vertical plane and provide a sidesupport for the flat glass pane B when it is lifted, whose lower edgerests on the rubber rollers 4.

I will now describe the apparatus for lifting a flat sheet of glass Bonto and off from the dolly A. This apparatus includes the centrallydisposed and upwardly extending mast C, see FIGS. 1, 2, 3 and 9. Thedolly frame A has an offset portion that includes laterally extendingmetal tubular members 22 and 23 whose ends are welded to the elongatedtubular member 1 so that they will extend at right angles thereto, seealso FIGS. 4 and 5. The outer ends of the tubular members 22 and 23 areinterconnected by another tubular member 24 that is welded in place andparallels the tubular member 1. A central tubular member 25 has its endswelded to the tubes 1 and 24 and it parallels the members 22 and 23. Thelower end of the mast C is pivotally mounted on the member 25 by meansof a pivot pin 26 that extends transversely through the mast and has itsends mounted in ears 27-27 that are welded to the central member 25, seeFIGS. 4, 5, and 9. Any other type of pivotal connection between the mastC and the member 25 may be used. It might be well to mention here thatthe offset frame portion comprising the tubular members 22, 23, 24 and25 also provide pockets for receiving counterweight blocks D-D, seeFIGS. 1, 2 and 3. The blocks may rest on metal straps 28 that are weldedto the tubular members 1 and 24.

The mast C slidably and pivotally carries a flat sheet glass liftingframe indicated generally at E in FIGS. 1, 2 and 3. A pair of plates29-29 slidably contact opposite sides of the mast C and are heldtogether by connecting bearing pins 30. The flat sheet glass liftingframe E is pivotally mounted on the plates 29-29 at 31. The frame E isin the form of an inverted A-frame whose apex is pivotally supported bythe pin 31 and whose extremities hingedly support a sheet glass liftingtubular arm 32 that parallels the tubular members 1 and 2. A winch F(having an automatic braking mechanism) is mounted on a pedestal 33 thathas its lower end welded to the horizontal tubular member 24 of theoffset portion of the dolly frame A. The winch has a cable 33 thatextends from the winch drum in an upward direction and is passed over apulley 54 that is mountd at the top of the mast C and the end of thecable is connected to the arm 32 of the glass lifting frame E. The winchautomatically locks at any position.

At each end of the sheet glass lifting arm 32, I removably mount amanually operated vacuum cup G of standard construction, see FIGS. 3 and8. The tubular arm 32 is hinged at 34 to the upper extremities of thesheet glass lifting frame E. Hook-shaped members 35 are welded at eachend of the arm 32 and FIG. 8 shows the vacuum cup G provided with ahandle 36 that can be received by the hook 35 for supporting the vacuumcup. An inclined gravity movable pin 37 is receivable in openings 38-38provided in the tubular arm 32, and in aligned openings 39-39 providedin the hook 35. When the pin 37 is in the position shown in FIG. 8, itwill prevent the accidental freeing of the handle 36 for the vacuum cupG from the hook 35. The inclination of the pin 37 will prevent it frombecoming accidentally freed from the hook. A chain 40 or other flexiblemember has one end connected to the arm 32 and its other end connectedto the pin 37. This chain prevents the pin 37 from being completelyfreed from the openings 38 in the arm 32 and becoming lost. The vacuumcups I carry means, not shown, for creating a vacuum in the cup G, whilethe cup is held against the pane of glass B. The vacuum is sufficientfor the cup to remain attached to the glass and cause the cup to liftthe glass when the frame E is lifted by means of the winch F and thecable 33. Only two vacuum cups are needed to lift large flat sheets ofglass. At the end of the lifting and transporting operation, the vacuumin the cups can be released and the cups removed from the glass.

It is possible to swing the mast C about its pivot 26, see FIG. 9, whenthe operator wishes to swing the mast lateraly for bringing the vacuumcups G, into contact with the side of a flat sheet of glass'B that is tobe removed from a case containing a number of glass sheets. In FIGS. 3and 10, I show the standard 33' provided with a hook 41 that extendstoward the mast C. A hand grip 42, see also FIGS. 1 and 2, extends fromthe mast C and parallels the length of the tubular member 1. Theoperator grasps this handle 42 when swinging the mast C from thevertical full line position, shown in FIG. 3,

into the inclined dot-dash line positon, shown in the same Figure. Ashort upwardly extending tubular stop member 43, see FIGS. 3, 4 and 9,has its lower end welded to the tubular member 1, and the mast C whenswung laterally will strike the upper end of the stop member and will beprevented from swinging any farther in the same direction. The hook 41on the standard 33 cooperates with a pivoted catch 44 that is carried bythe mast C, and when the mast is in a vertical position, as in FIG. 3,the pivoted catch 44 will engage with the hook 41 and prevent anyaccidental swinging of the mast, see also FIG. 10. A latch release rod45 has its lower end pivotally connected to the latch 44 and has itsupper end slidably received in an opening provided in the hand grip 42.The release rod has an offset bend 46, see FIG. 2, that is positonednear to the hand grip 42 so that the operator can use a finger or thumbof the same hand that grips the hand grip 42 to engage with the offset46 for lifting the latch release rod vertically for swinging the latch44 away from the hook 41. In this way the operator has the swinging ofthe mast C under control at the time he frees the latch 44.

I will now describe how the dolly can be moved in any desired direction.At the center of the dolly frame A, I provide two main support wheels H,and since the structure of both is identical, a detailed description ofone will suffice for both and like reference characters will be appliedto similar parts. FIGS. 1, 2 and 3 show box-like housings 47 secured tothe tubular member 2 of the dolly frame A and to the tubular member 24of the offset portion of the frame, see FIGS. 4 and 5. In FIGS. 6 and 7,1 illustrate one way of mounting the main support wheel H, so that itcan be swung about a vertical axis for a purpose presently to bedescribed.

The housing 47 has a central cylindrical bearing 48 in which a verticalcylindrical shank 49 is rotatably mounted. The lower end of the shank 49is bifurcated and rotatably carries'the wheel H, see FIG. 6. An arm 50,see FIGS. 4, 5 and 7, is attached to the top of the shank 49 by bolts 51and a hand grip 52 extends vertically from the free end of the arm. Astop pin 53 is supported at the other end of the arm and is receivablein either one of two openings 54 provided in the top of the housing 47.When the handles 50 for the two wheels H are swung into positonsparalleling the tubular members 2 and 240i" the dolly frame A, the axesof the wheels H will extend at right angles to the tubular members andthe wheels permit the dolly to move in the directions indicated by thedouble arrows 55 in FIG. 4. The stop pins 55 will enter the registeringopenings 54 and prevent any accidental swinging of the arms 50. If theoperator wishes to move the dolly frame A in a lateral direction, hefrees the stop pins 53 and swings the arms 50 into the positions shownin FIG. 5, whereupon the stop pins 53 are reinserted in their newpositions and the dolly wheel H will permit the dolly to move laterallyas indicated by the double arrows 56 in FIG. 5.

Referring again to FIGS. 2 and 3, I mount caster wheels 57 and 58 underthe dolly frame A, and space them equal distances from the main supportwheels H. These caster wheels permit the dolly to be swung around in acircule whose diameter is no longer than the length of the dolly whenthe support wheels H are in the position shown in FIG. 2. The dolly isalso provided with standard safety floor locks, indicated generally at59 and 60 in FIGS. 2 and 3. The type of floor lock that is preferablyused is the one where a pedal,

not shown, on the lock is depressed by the foot for causing the lock tocontact the floor and prevent the dolly from moving.

OPERATION From the foregoing description of the various parts of thedevice, the operation thereof may be readily understood. The dolly canbe used for removing sheet glass from a case containing a number ofsheets of flat glass. The case of sheet glass is set on one of its edgesso tha the sheets of flat glass within the case are inclined only to aslight degree from a vertical plane. First the lid of the case can beremoved. The operator can move the dolly near to the side of the casewhere the lid is to be removed. He then grasps the hand grip 42 for themast C and with his thumb raises the release rod 45 by engaging theoffset bend 46, see FIG. 2. This will swing the catch 44 free of thehook 41, see FIGS. 3 and 10, and the operator can swing the mast Ctoward the side of the lid. He also can operate the Winch F for causingthe cable 33 to raise or lower the frame E on the mast. The vacuum cupsG are removed and the hooks 35 (or suction cup brackets) are used tohook onto a lid board for lifting the lid. The winch F is oper ated toraise the lid onto the dolly. The dolly is then moved away and carriesthe lid with it. The lower edge of the lid can rest on the wooden strips6 during the transporting of the lid. I

Then the operator returns the dolly to the case of flat sheet glass, notshown, and again swings the mast C and adjusts the frame E on the mastso that the vacuum cups G will be placed in the right position on theglass sheet. The operator stands on the left hand side of the dollyframe A during this operation, see FIG. 3, and the safety locks 59 havebeen depressed so as to hold the dolly from moving. The operator is onthe safe side of the dolly and even though the mast C and the frame Eare both swung to the right about their pivots 26 and 31, respectively,see also FIG. 9, the counterweights will prevent any'lateral tipping ofthe dolly. The glass sheet B is elevated a slight distance after thesuction cups G have been applied to the glass and the winch F has beenoperated to wind up the cable 33 for a short distance. The operator thenbreaks any suction between the glass sheet B, gripped by the suctioncups and the next sheet of glass in the case.

The sheet of glass B may now be lifted away from the case of glass, notshown, the operator actuating the winch F for lifting the glass sheet Band swinging the mast C back into a vertical position where the latch 44will engage with the hook 41, see FIGS. 3 and 10 for holding the mastfrom accidental swinging. The operator performs these operations whilestanding on the left hand side of the dolly in a safe position. Thewinch is operated for lowering the glass sheet B so that its lower edgewill rest on the solid rubber rollers 4. The dolly may now be moved toany place desired and will transport the sheet of glass with it in themanner shown in FIG. 1. The above operations are reversed whentransferring the sheet of glass from the dolly to the glass cuttingtable or to a truck, not shown, or to a window opening at a buildingsite.

It is possible to use the dolly and pull a glass sheet endwise from acase containing glass sheets. Glass tongs, not shown, are used by theoperator for gripping the sheet and then the operator can pull on thetongues for moving the glass sheet onto the dolly, the lower edge of theglass sheet travelling over and being supported by the hard rubberrollers 4. The dolly has been previously positioned so that the glasssheet guideway comprising the wooden strips 6 and the rollers 4 are inalignment with the length of the glass sheet B and the safety floorlocks 59 have been moved into contact with the floor to preventaccidental movement of the dolly. After the glass sheet has beencentered with respect to the rollers 4, the sheet is pulled onto thedolly and the suction cups G are applied to the glass. It is nowpossible to move the dolly with the glass sheet to the tilting cuttingtable orv to the truck or to a window opening at a building site, notshown. The mast C can be tilted for moving the glass sheet onto thetruck rack or onto the cutting table or to the window opening.

The stop 43, see FIG. 9, stops the angular tilting of the mast C aboutits pivot 26 when the top of the mast has swung from a vertical positionthrough a distance of about twenty-seven inches. The counterweights Dwill prevent the dolly from tipping over.

I claim:

1. A dolly for lifting and transporting flat sheet material andcomprising:

a. an elongated guideway for receiving the lower edge of a flat sheetfor supporting the sheet;

b. uprights disposed on one side of the elongated guideway against whichthe flat sheet can rest;

c. an upwardly extending mast disposed on the same side of the guidewayas said uprights;

d. lifting means for the flat sheet material slidably mounted on saidmast;

e. said mast having its lower end pivotally mounted on said dolly sothat the mast can swing in a transverse direction with respect to thelength of the dolly; and

f. counterweights mounted on the dolly for counterbalancing the weightof said mast when it is in an inclined position.

2. The combination as set forth in claim 1: and in which a. a standardextends upwardly from the dolly and parallels the mast and is spacedtherefrom when the mast is in a vertical position;

b. manually releasable means for securing the mast to said standard forpreventing any swinging of the mast about its pivot; and

c. a stop disposed on the dolly and positioned on the opposite side ofthe mast from the standard, said stop lying in the path of the swingingmast for stopping any further mast swinging in the same direction whenthe mast abuts said stop;

d. whereby said stop prevents the tipping over in a lateral directionwhen the mast contacts the stop.

3. A dolly for lifting and transporting flat sheet material andcomprising:

a. an elongated guideway for receiving the lower edge of a flat sheetfor supporting the sheet;

b. uprights disposed on one side of the elongated guideway against whichthe flat sheet can rest;

0. an upwardly extending mast disposed on the same side of the guidewayas said uprights;

d. lifting means for the flat sheet material slidably mounted on saidmast;

e. the lifting means for the flat sheet material including a frameslidably and pivotally mounted on said mast;

f. means on said frame for engaging with the flat sheet material forlifting it when said frame is moved upwardly on said mast; and

g. a winch and cable attached to said frame for causing the cable tomove the frame when said winch is operated.

4. The combination as set forth in claim 3: and in which a. said masthas its lower end pivotally mounted on said dolly so that it can swingin a lateral direction so as to extend over the guideway;

b. said cable by being attached to said frame permitting said frame toswing about its pivot in a lateral direction and to swing in the samedirection as said mast;

0. whereby the swinging of the mast and frame will permit the frame toswin beyond the side of the elongated guideway disposed opposite to saiduprights and to be attached to a flat sheet of material disposed alongthe side of said dolly preparatory to lifting the sheet.

5. The combination as set forth in claim 3: and in which a. the means onsaid frame for engaging with the flat sheet material includes vacuumcups removably carried by said frame.

6. A dolly for lifting and transporting flat sheet material andcomprising:

a. an elongated guideway for receiving the lower edge of a flat sheetfor supporting the sheet;

b. uprights disposed on one side of the elongated guideway against whichthe flat sheet can rest;

0. an upwardly extending mast disposed on the same side of the guidewayas said uprights;

d. lifting means for the flat sheet material slidably mounted on saidmast;

e. a pair of main support wheels for the dolly mounted at the dollycenter and being spaced laterally from each other;

f. caster wheels spaced equal distances longitudinally on each side ofsaid main support wheels and either caster wheel being used with themain support wheels for a short radius turning of the dolly on thefloor;

g. the pair of main support wheels being rotatable about vertical axesand having means for securing so that their horizontal axes extendtransverse to the length of the dolly for permitting the dolly to bemoved in the direction of its length; and

h. the pair of main support wheels also being swingable about theirvertical axes so that their horizontal axes parallel the length of thedolly for permitting the dolly to be moved laterally in eitherdirection, said lastnamed means securing said wheels in their secondposition.

7. A dolly for lifting and transporting flat sheet material andcomprising:

a. a base member movable over the floor;

b. an upwardly extending mast pivotally supported by said base and beingswingable so that the top of said mast can extend beyond one side ofsaid base when the mast is swung into an inclined position;

0. a winch and cable for swinging said mast about its pivot;

d. a frame operatively connected to said mast and being connected tosaid cable so as to be supported 9 10 thereby, said cable also raisingand lowering said on said dolly so that the mast can swing in atransframe; and verse direction with respect to the length of the e.means carried by said frame for supporting a flat d 11 sheet ofmateflal- 9. The combination as set forth in claim 7: and in 8. A dollyfor lifting and transporting flat sheet matewhich rial and comprising:

a. an elongated guideway for receiving the lower edge of a flat sheetfor supporting the sheet; b. uprights disposed on one side of theelongated a. said frame has its lower end slidably and pivotally mountedon said mast;

b. said cable being connected to the top of said frame and extendingover a pulley disposed at the top of guideway against which the flatsheet can rest; c. an upwardly extending mast disposed on the same Saldmast;

id f h id as id uprights; and c. whereby said frame 18 free to swingabout its pivot d. lifting means for the flat sheet material slidably asas to slide along Said mast as the frame is mounted on said mast; movedby said cable. e. said mast having its lower end pivotally mounted

1. A dolly for lifting and transporting flat sheet material andcomprising: a. an elongated guideway for receiving the lower edge of aflat sheet for supporting the sheet; b. uprights disposed on one side ofthe elongated guideway against which the flat sheet can rest; c. anupwardly extending mast disposed on the same side of the guideway assaid uprights; d. lifting means for the flat sheet material slidablymounted on said mast; e. said mast having its lower end pivotallymounted on said dolly so that the mast can swing in a transversedirection with respect to the length of the dolly; and f. counterweightsmounted on the dolly for counterbalancing the weight of said mast whenit is in an inclined position.
 2. The combination as set forth in claim1: and in which a. a standard extends upwardly from the dolly andparallels the mast and is spaced therefrom when the mast is in avertical position; b. manually releasable means for securing the mast tosaid standard for preventing any swinging of the mast about its pivot;and c. a stop disposed on the dolly and positioned on the opposite sideof the mast from the standard, said stop lying in the path of theswinging mast for stopping any further mast swinging in the samedirection when the mast abuts said stop; d. whereby said stop preventsthe tipping over in a lateral direction when the mast contacts the stop.3. A dolly for lifting and transporting flat sheet material andcomprising: a. an elongated guideway for receiving the lower edge of aflat sheet for supporting the sheet; b. uprights disposed on one side ofthe elongated guideway against which the flat sheet can rest; c. anupwardly extending mast disposed on the same side of the guideway assaid uprights; d. lifting means for the flat sheet material slidablymounted on said mast; e. the lifting means for the flat sheet materialincluding a frame slidably and pivotally mounted on said mast; f. meanson said frame for engaging with the flat sheet material for lifting itwhen said frame is moved upwardly on said mast; and g. a winch and cableattached to said frame for causing the cable to move the frame when saidwinch is operated.
 4. The combination as set forth in claim 3: and inwhich a. said mast has its lower end pivotally mounted on said dolly sothat it can swing in a lateral direction so as to extend over theguideway; b. said cable by being attached to said frame permitting saidframe to swing about its pivot in a lateral direction and to swing inthe same direction as said mast; c. whereby the swinging of the mast andframe will permit the frame to swin beyond the side of the elongatedguideway disposed opposite to said uprights and to be attached to a flatsheet of material disposed along the side of said dolly preparatory tolifting the sheet.
 5. The combination as set forth in claim 3: and inwhich a. the means on said frame for engaging with the flat sheetmaterial includes vacuum cups removably carried by said frame.
 6. Adolly for lifting and transporting flat sheet material and comprising:a. an elongated guideway for receiving the lower edge of a flat sheetfor supporting the sheet; b. uprights disposed on one side of theelongated guideway against which the flat sheet can rest; c. an upwardlyextending mast disposed on the same side of the guideway as saiduprights; d. lifting means for the flat sheet material slidably mountedon said mast; e. a pair of main support wheels for the dolly mounted atthe dolly center and being spaced laterally from each other; f. casterwheels spaced equal distances longitudinally on each side of said mainsupport wheels and either caster wheel being used with the main supportwheels for a short radius turning of the dolly on the floor; g. the pairof main support wheels being rotatable about vertical axes and havingmeans for sEcuring so that their horizontal axes extend transverse tothe length of the dolly for permitting the dolly to be moved in thedirection of its length; and h. the pair of main support wheels alsobeing swingable about their vertical axes so that their horizontal axesparallel the length of the dolly for permitting the dolly to be movedlaterally in either direction, said last-named means securing saidwheels in their second position.
 7. A dolly for lifting and transportingflat sheet material and comprising: a. a base member movable over thefloor; b. an upwardly extending mast pivotally supported by said baseand being swingable so that the top of said mast can extend beyond oneside of said base when the mast is swung into an inclined position; c. awinch and cable for swinging said mast about its pivot; d. a frameoperatively connected to said mast and being connected to said cable soas to be supported thereby, said cable also raising and lowering saidframe; and e. means carried by said frame for supporting a flat sheet ofmaterial.
 8. A dolly for lifting and transporting flat sheet materialand comprising: a. an elongated guideway for receiving the lower edge ofa flat sheet for supporting the sheet; b. uprights disposed on one sideof the elongated guideway against which the flat sheet can rest; c. anupwardly extending mast disposed on the same side of the guideway assaid uprights; and d. lifting means for the flat sheet material slidablymounted on said mast; e. said mast having its lower end pivotallymounted on said dolly so that the mast can swing in a transversedirection with respect to the length of the dolly.
 9. The combination asset forth in claim 7: and in which a. said frame has its lower endslidably and pivotally mounted on said mast; b. said cable beingconnected to the top of said frame and extending over a pulley disposedat the top of said mast; c. whereby said frame is free to swing aboutits pivot as well as to slide along said mast as the frame is moved bysaid cable.